WELL SEALING METHOD AND APPARATUS

摘要

A method for forming a plug in a well comprises filling a length of the well with a molten material the melting point of which is higher than the temperature within the well and which expands as it solidifies upon cooling to the temperature within the well. Also an apparatus for forming a plug in a well comprises means for filling a length of the well with a molten material the melting point of which is higher than the temperature within the well and which expands as the material solidifies upon cooling to the temperature within the well.